The value of microfacies analysis is demonstrated by an example from the Middle Ordovician of the Oslo Region. Limestones and shales were sampled systematically and studied in thin section by X-ray diffraction and by insoluble residue determination. The results indicate greater sedimentological and biological variation in this succession than previously thought.
The Middle Ordovician of the Oslo Region, Norway. 25. Methods for the study of microfacies with an example from the Oslo Region.